This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 12 |
| 4 | 110 |
| 5 | 120 |
| 6 | 1020 |
| 7 | 1200 |
| 8 | 1248 |
| 9 | 10250 |
| 10 | 11250 |
| 11 | 12480 |
| 12 | 31248 |
| 13 | 132600 |
| 14 | 124800 |
| 15 | 112500 |
| 16 | 312480 |
| 17 | 1248000 |
| 18 | 1312500 |
| 19 | 1125000 |
| 20 | 3124800 |
| 21 | 14437500 |
| 22 | 16250000 |
| 23 | 11250000 |
| 24 | 31248000 |
| 25 | 103125000 |
| 26 | 144375000 |
| 27 | 112500000 |
| 28 | 131250000 |